а. -1/2 и -1:
-1/2 < -1

б. -5/6 и -1/6:
-5/6 < -1/6

в. -1 1/3 и -1 1/2:
-1 1/3 = -4/3
-1 1/2 = -3/2
-4/3 > -3/2

г. -11/7 и -7/11:
-11/7 < -7/11

д. -2 и -1 1/3:
-2 = -6/3
-1 1/3 = -4/3
-6/3 < -4/3

е. -2/3 и -3/4:
-2/3 = -8/12
-3/4 = -9/12
-8/12 > -9/12

ж. -4,12 и -4,21:
-4,12 < -4,21

з. -7,3 и -7,03:
-7,3 = -7.3
-7,03 = -7.03
-7.3 > -7.03